Figure 38

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United States map showing 2018 rates of reported primary and secondary syphilis cases by county; morbidity ranged from 0 to 304 cases per 100,000 population. In 2018, 61.5% of reported primary and secondary syphilis cases occurred in 70 counties or independent cities. Of 3,142 counties in the United States, 556 (17.7%) had a primary and secondary syphilis rate of 8.8 cases per 100,000 population or greater, 557 (17.7%) reported a rate from 4.2 to 8.7 cases per 100,000 population, 531 (17.0%) reported a rate from more than 0.0 to 4.1 cases per 100,000 population, and 1,498 (47.7%) counties reported no cases of primary and secondary syphilis in 2018.